79789873299840 has 1536 divisors, whose sum is σ = 330655127961600. Its totient is φ = 17523733708800.

The previous prime is 79789873299827. The next prime is 79789873299869. The reversal of 79789873299840 is 4899237898797.

79789873299840 is a `hidden beast` number, since 7 + 9 + 7 + 89 + 87 + 329 + 98 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (90).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2123238171 + ... + 2123275749.

It is an arithmetic number, because the mean of its divisors is an integer number (215270265600).

Almost surely, 2^{79789873299840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79789873299840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165327563980800).

79789873299840 is an abundant number, since it is smaller than the sum of its proper divisors (250865254661760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79789873299840 is a wasteful number, since it uses less digits than its factorization.

79789873299840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37716 (or 37701 counting only the distinct ones).

The product of its (nonzero) digits is 27653197824, while the sum is 90.

The spelling of 79789873299840 in words is "seventy-nine trillion, seven hundred eighty-nine billion, eight hundred seventy-three million, two hundred ninety-nine thousand, eight hundred forty".